/*
 * Copyright 2021 The Backstage Authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import { Step, createStepDefinition } from '../types';

type Data = {
  message: string;
};

class MessageStep implements Step {
  constructor(private readonly data: Data) {}

  async run() {
    console.log(this.data.message);
  }
}

export const message = createStepDefinition<Data>({
  type: 'message',

  deserialize(obj) {
    const { message: msg } = obj;

    if (!msg || (typeof msg !== 'string' && !Array.isArray(msg))) {
      throw new Error(
        "Invalid install step, 'message' must be a string or array",
      );
    }
    return new MessageStep({ message: [msg].flat().join('') });
  },

  create(data: Data) {
    return new MessageStep(data);
  },
});
